public class Numbers
{
   /**
      Computes a sum of even integers 
      @param a the lower bound (may be odd or even)
      @param b the upper bound (may be odd or even)
      @return the sum of even integers between a and b (inclusive).
   */
   public int evenSum(int a, int b)
   {
      // your work here
      int s=0;
      for(int i=a; i<=b ;i++) {
         if(i%2==0) {
            s+=i;
         }
      }
      
      return s;
   
   
   
   
   }
}